Q. $\left( NH_{4} \right)_{2}Cr_{2}O_{7}$ on heating liberates a gas. The same gas will be obtained by
A) Heating $NH_{4}NO_{3}$
B) Heating $NH_{4}NO_{2}$
C) Treating $H_{2}O_{2}\ with\ NaNO_{2}$
D) Treating $Mg_{3}N_{2}\ with\ H_{2}O$
Explanation
(b)
$\left( NH_{4} \right)_{2}Cr_{2}O_{7}\overset{\mathrm{\Delta}}{\rightarrow}\ N_{2} \uparrow + Cr_{2}O_{3} + 4H_{2}O$
$NH_{4}NO_{2} \rightarrow N_{2} \uparrow + 2H_{2}O$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.